TITLE: GCN CIRCULAR NUMBER: 31426 SUBJECT: GRB 220107A: further SAO RAS optical observations DATE: 22/01/09 23:40:53 GMT FROM: Moskvitin Alexander at SAO RAS A. Moskvitin (SAO) and A. Medvedev (SAO), on behalf of larger GRB follow-up team report: We observed the field of GRB 220107A (The Fermi GBM team, GCN 31399; Kunzweiler et al. GCN 31400; DeLaunay et al. GCN 31402; Suresh et al., GCN 31408) with the SAO RAS 1-m telescope Zeiss-1000 + CCD-photometer. 6 x 300 sec. images were obtained in Rc band on January 9, 22:27:09 -- 23:10:20 UT (T_mid - T0 = 2.3356 days). The OT (Hosokawa et al. GCN 31413; Siegel GCN 31415; Zhu et al. GCN 31416; Pankov et al., GCN 31419; Moskvitin et al., GCN 31422; Castro-Tirado et al., GCN 31423) is clearly visible in the stacked frame. Preliminary photometry of the afterglow is R = 21.01 +/- 0.04 (based on nearby SDSS-DR12 stars mentioned in GCN 31422).